function initFontSize() {
	var minus = document.getElementById('fontMinus');
	var plus = document.getElementById('fontPlus');
	if (minus!=null) {
		minus.onclick = function() { thisPage.changeStyles(0); }
		minus.onkeypress = function() { thisPage.changeStyles(0); }
	}
	if (plus!=null) {
		plus.onclick = function() { thisPage.changeStyles(1); }
		plus.onkeypress = function() { thisPage.changeStyles(1); }
	}
}

function trimAll(sString) {
	while (sString.substring(0,1) == ' ') {
		sString = sString.substring(1, sString.length);
	}
	while (sString.substring(sString.length-1, sString.length) == ' ') {
		sString = sString.substring(0,sString.length-1);
	}
	return sString;
}

function setTxtSearch(id,text) {
	if (id!=null && id!="" && text!=null && text!="") {
		if (trimAll(document.getElementById(id).value) == "") {
			document.getElementById(id).value = text;
		}
	}
}

function setTxtSearchBlanco(id,text) {
	if (id!=null && id!='' && text!=null && text!='') {
		if (trimAll(document.getElementById(id).value) == text) {
			document.getElementById(id).value = "";
		}
	}
}