// Nannette Thacker http://www.shiningstar.net
function confirmDelete(){
	var agree=confirm("Voulez-vous vraiment supprimer cette entrée?\r\nCliquez Ok pour l'effacer.");
	if (agree){
		return true ;
	}else{
		return false ;
	}
}

function dropdown_clearbyid(element_id){
	element = document.getElementById(element_id);
	while((element.length>0) && (element.options[element.length - 1]!=null)){
		element.options[element.length - 1] = null;
	}
}

function dropdown_selectallbyid(element_id){
	element = document.getElementById(element_id);
	var i;
	for(i=element.options.length-1;i>=0;i--){
		element.options[i].selected = 'selected';
	}
}

function dropdown_removeoptionbyid(element_id, option_index){
	element = document.getElementById(element_id);
	if((element.length>0) && (element.options[element.length - 1]!=null)){
		element.options[option_index] = null;
	}
}

function dropdown_removeselectedoptionsbyid(element_id){
	element = document.getElementById(element_id);
	var i;
	for(i=element.options.length-1;i>=0;i--){
		if(element.options[i].selected){
			element.remove(i);
		}
	}
}

function dropdown_addbyid(element_id, cbo_value, cbo_text){
	element = document.getElementById(element_id);
	element.options[element.length] = new Option(cbo_text, cbo_value);
}

function do_submitbyid(elementid, act){
	element = document.getElementById(elementid);
	element.action = act;
	element.submit();
}

function get_valuebyid(elementid){
	element = document.getElementById(elementid);
	return element.value;
}

function get_altbyid(elementid){
	element = document.getElementById(elementid);
	return element.alt;
}

function sha1(hash_string){
	var K = [0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6];	// constants [§4.2.1]
	
	// PREPROCESSING
	hash_string += String.fromCharCode(0x80); // add trailing '1' bit (+ 0's padding) to string [§5.1.1]

	// convert string hash_string into 512-bit/16-integer blocks arrays of ints [§5.2.1]
	var l = hash_string.length/4 + 2;  // length (in 32-bit integers) of hash_string + ‘1’ + appended length
	var N = Math.ceil(l/16);   // number of 16-integer-blocks required to hold 'l' ints
	var M = new Array(N);
	for (var i=0; i<N; i++) {
		M[i] = new Array(16);
		for (var j=0; j<16; j++) {  // encode 4 chars per integer, big-endian encoding
			M[i][j] = 	(hash_string.charCodeAt(i*64+j*4)<<24) | (hash_string.charCodeAt(i*64+j*4+1)<<16) | 
						(hash_string.charCodeAt(i*64+j*4+2)<<8) | (hash_string.charCodeAt(i*64+j*4+3));
		}
	}
	// add length (in bits) into final pair of 32-bit integers (big-endian) [5.1.1]
	// note: most significant word would be (len-1)*8 >>> 32, but since JS converts
	// bitwise-op args to 32 bits, we need to simulate this by arithmetic operators
	M[N-1][14] = ((hash_string.length-1)*8) / Math.pow(2, 32); M[N-1][14] = Math.floor(M[N-1][14])
	M[N-1][15] = ((hash_string.length-1)*8) & 0xffffffff;

	// set initial hash value [§5.3.1]
	var H0 = 0x67452301;	var H1 = 0xefcdab89;	var H2 = 0x98badcfe;
	var H3 = 0x10325476;	var H4 = 0xc3d2e1f0;

	// HASH COMPUTATION [§6.1.2]
	var W = new Array(80); var a, b, c, d, e;
	for (var i=0; i<N; i++){
		// 1 - prepare message schedule 'W'
		for (var t=0;  t<16; t++) W[t] = M[i][t];
		for (var t=16; t<80; t++) W[t] = ROTL(W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16], 1);
		// 2 - initialise five working variables a, b, c, d, e with previous hash value
		a = H0; b = H1; c = H2; d = H3; e = H4;
		// 3 - main loop
		for (var t=0; t<80; t++) {
			var s = Math.floor(t/20); // seq for blocks of 'f' functions and 'K' constants
			var T = (ROTL(a,5) + f(s,b,c,d) + e + K[s] + W[t]) & 0xffffffff;
			e = d;		d = c;		c = ROTL(b, 30);
            b = a;		a = T;
		}
		// 4 - compute the new intermediate hash value
		H0 = (H0+a) & 0xffffffff;  // note 'addition modulo 2^32'
		H1 = (H1+b) & 0xffffffff; 
		H2 = (H2+c) & 0xffffffff; 
		H3 = (H3+d) & 0xffffffff; 
		H4 = (H4+e) & 0xffffffff;
	}
	return H0.toHexStr() + H1.toHexStr() + H2.toHexStr() + H3.toHexStr() + H4.toHexStr();
}

// function 'f' [§4.1.1]
function f(s, x, y, z){
	switch (s) {
		case 0: return (x & y) ^ (~x & z);           // Ch()
		case 1: return x ^ y ^ z;                    // Parity()
		case 2: return (x & y) ^ (x & z) ^ (y & z);  // Maj()
		case 3: return x ^ y ^ z;                    // Parity()
	}
}

// rotate left (circular left shift) value x by n positions [§3.2.5]
function ROTL(x, n){	return (x<<n) | (x>>>(32-n));	}

// extend Number class with a tailored hex-string method 
//   (note toString(16) is implementation-dependant, and 
//   in IE returns signed numbers when used on full words)
Number.prototype.toHexStr = function(){
	var s="", v;
	for (var i=7; i>=0; i--) { v = (this>>>(i*4)) & 0xf; s += v.toString(16); }
	return s;
}

function set_valuebyid(elementid, xvalue){
	element = document.getElementById(elementid);
	element.value = xvalue;
}

function set_innerHTMLbyid(elementid, xvalue){
	element = document.getElementById(elementid);
	element.innerHTML = xvalue;	
}

function is_email(email){
	var verif = /^([a-zA-Z0-9_-])+([.]?[a-zA-Z0-9_-]{1,})*@([a-zA-Z0-9-_]{2,}[.])+[a-zA-Z]{2,4}$/;
	if (verif.exec(email) == null){
		return false;
	}else{
		return true;
	}
}

function trim(string){
    return string.replace(/^\s+/, '').replace(/\s+$/, '');
}

function remove_accents(str_w_accents){
	str_w_accents = str_w_accents.split('');
	str_wo_accents = new Array();
	str_w_accentsLen = str_w_accents.length;
	var accents = 'ÀÁÂÃÄÅàáâãäåÒÓÔÕÕÖØòóôõöøÈÉÊËèéêëðÇçÐÌÍÎÏìíîïÙÚÛÜùúûüÑñŠšŸÿýŽž';
	var no_accents = ['A','A','A','A','A','A','a','a','a','a','a','a','O','O','O','O','O','O','O','o','o','o','o','o','o','E','E','E','E','e','e','e','e','e','C','c','D','I','I','I','I','i','i','i','i','U','U','U','U','u','u','u','u','N','n','S','s','Y','y','y','Z','z'];
	for (var y = 0; y < str_w_accentsLen; y++) {
		if (accents.indexOf(str_w_accents[y]) != -1) {
			str_wo_accents[y] = no_accents[accents.indexOf(str_w_accents[y])];
		}else{
			str_wo_accents[y] = str_w_accents[y];
		}
	}
	str_wo_accents = str_wo_accents.join('');
	return str_wo_accents;
}

function exist_byid(elementid){
	element = document.getElementById(elementid);
	if(element){
		return true;
	}else{
		return false;
	}
}

function disable_byid(elementid){
	if(exist_byid(elementid)){
		element = document.getElementById(elementid);
		element.disabled = true;
	}	
}

function enable_byid(elementid){
	if(exist_byid(elementid)){
		element = document.getElementById(elementid);
		element.disabled = false;
	}
}

function is_numeric(num){
	var verif = /^\d+$/;
	if (verif.exec(num) == null){
		return false;
	}else{
		return true;
	}
}

function strlen_between(string, min_length, max_length){
	string = trim(string);
	if((is_numeric(min_length)) && (is_numeric(max_length))){
		if((string.length>=min_length) && (string.length<=max_length)){
			return true;
		}else{
			return false;
		}
	}else{
		return false;
	}
}