function checkValue(formSelected,arg){
		if(arg=="select"){
			lenghtvalue = 0;
		}else{
			lenghtvalue = 3;
		}
		formulaireEle = info[0];
		var obj = formulaireEle.getElementsByTagName(arg);
		strAlert = ""
		errorForm = info[2];
		for(i=0;i<obj.length;i++){
			
				if (obj[i].className.indexOf("need") >=0){
						iField     = obj[i];
						iId        = obj[i].id;
						iName      = obj[i].name;
						iValue     = obj[i].value;
						iAlt       = obj[i].alt;
						iLength    = obj[i].value.length;
						
						iField.className = "need";
						
						if (iName.indexOf('mail') >= 0 && iValue != "" && iLength < lenghtvalue){
								posAt = iValue.indexOf("@");
								posDot = iValue.substr(posAt,iLength).indexOf(".");
								if (posAt < 2 || posDot < 2){
										iField.className = "neederror";
										errorForm++;
										strAlert += iAlt +", ";
								}
						} else if (iLength < lenghtvalue){
								iField.className = "neederror";
								errorForm++;
								strAlert += iAlt +", ";
						}
				}
		}
		info[0] = formulaireEle;
		info[1] += strAlert;
		info[2] = errorForm;
		return info;
	
}


function checkForm(formSelected,alertString){
		info = new Array();
				info[0] = formSelected;
				info[1] = "";
				info[2] = 0;
		
		info = checkValue(info,"input");
		info = checkValue(info,"textarea");
		info = checkValue(info,"select");
		
		if (info[2]>0){ 
				alert(alertString+"\n"+info[1].substring(0,info[1].length-2)+". ");
				return false;
		} else {
				return true;
		}
}