function isFilled(elm) {
	if (elm.value=="" || elm.value==null) {
		return false;
	} else {
		return true;
	}
}

function isInt(elm) {
	if (elm.value == "") {
		return false;
	}
	for (var i = 0; i < elm.value.length; i++) {
		if (elm.value.charAt(i) < "0" || elm.value.charAt(i) > "9") {
			return false;
		}
	}
	return true;
}

function isValidImageFormat(filename) {
	at_pos_jpg=filename.indexOf(".jpg",1)  // .jpg format
	at_pos_jpeg=filename.indexOf(".jpeg",1)  // .jpeg format
	if ((at_pos_jpg==-1) && (at_pos_jpeg==-1)) {
		return false;
	}
	return true;
}

function isValidDocumentFormat(filename) {
	at_pos_doc=filename.indexOf(".doc",1)  // .doc format
	at_pos_rtf=filename.indexOf(".rtf",1)  // .rft format
	at_pos_pdf=filename.indexOf(".pdf",1)  // .pdf format
	if ((at_pos_doc==-1)&&(at_pos_rtf == -1)&&(at_pos_pdf == -1)) {
		return false;
	}
	return true;
}

function validEmail(email) {
	invalidChars = " /:,;";
	for (i=0; i<invalidChars.length; i++) {	// does it contain any invalid characters?
		badChar = invalidChars.charAt(i);
		if (email.indexOf(badChar,0) > -1) {
			return false;
		}
	}
	atPos = email.indexOf("@",1)	// there must be one "@" symbol
	if (atPos == -1) {
		return false;
	}
	if (email.indexOf("@",atPos+1) != -1) {	// and only one "@" symbol
		return false;
	}
	periodPos = email.indexOf(".",atPos)
	if (periodPos == -1) {	// and at least one "." after the "@"
		return false;
	}
	if (periodPos+3 > email.length)	{	// must be at least 2 characters after the "."
		return false;
	}
	return true;
}

function chkSelAll() {
	f = document.forms["frmSearch"];
	for (var i=0;i<f.elements.length;i++) { 
		var e = f[i];
		if (e.name == "chkSelAll[]") {
			for (var i=0;i<f.elements.length;i++) { 
				var g = f[i];
				if (g.name == "chkPropType[]") {
					if (e.checked == true) {
						g.checked = true;
					} else {
						g.checked = false;
					}
				}
			}
			break;
		}
	}
}