if(!document.getElementById) {
	if(document.all) {
		document.getElementById=function() {
			if(typeof document.all[arguments[0]]!="undefined"){return document.all[arguments[0]]}else{return null}
		}
	}
	else if(document.layers) {
		document.getElementById=function() {
			if(typeof document[arguments[0]]!="undefined"){return document[arguments[0]]}else{return null}
		}
	}
}

function tap() {
	var element = document.getElementById("idmsg");
	if(element.rows < 10)
		element.rows+=1;
}

function tam() {
	var element = document.getElementById("idmsg");
	if(element.rows > 2)
		element.rows = element.rows-1;
}

function cnum(entree) {
	var chiffres = new RegExp('[0-9\.]');
	var verif;
	var points = 0;

	for(x = 0; x < entree.value.length; x++) {
		verif = chiffres.test(entree.value.charAt(x));
		if(entree.value.charAt(x) == '.'){points++;}
		if(points > 1){verif = false; points = 1;}
		if(verif == false){entree.value = entree.value.substr(0,x) + entree.value.substr(x+1,entree.value.length-x+1); x--;}
	}
}