function trim_string() {
	var ichar, icount;
	var strValue = this;
	ichar = strValue.length - 1;
	icount = -1;
	while (strValue.charAt(ichar)==' ' && ichar > icount)
		--ichar;
	if (ichar!=(strValue.length-1))
		strValue = strValue.slice(0,ichar+1);
	ichar = 0;
	icount = strValue.length - 1;
	while (strValue.charAt(ichar)==' ' && ichar < icount)
		++ichar;
	if (ichar!=0)
		strValue = strValue.slice(ichar,strValue.length);
	return strValue;
}

function es_non_blank() {
	var item = event.srcElement;
	event.returnValue = vs_non_blank(item);
}
function vs_non_blank(item) {
	item.value=item.value.Trim();
	if (item.value.length==0) {
		item.focus();
		return false;
	}
	return true;
}
function validation_setup() {
	this.eventNonBlank = es_non_blank;
	this.nonBlank = vs_non_blank;
	return this;
}
String.prototype.Trim = trim_string;
var validation = new Object;
validation = validation_setup();