function setPage(pid){
	switch(pid){
		case "welcome":
			equalHeightDivs("str_a", "str_b", "str_c");
		break;
	}
}

function equalHeightDivs(div_1, div_2, div_3){
		var maxHeight;
		if(document.getElementById(div_1) && document.getElementById(div_2)){
			if(document.getElementById(div_1).offsetHeight > document.getElementById(div_2).offsetHeight){
				maxHeight=document.getElementById(div_1).offsetHeight;
			}
			else {
				maxHeight=document.getElementById(div_2).offsetHeight;
			}
		}
		if(document.getElementById(div_3)){
			if(document.getElementById(div_3).offsetHeight > maxHeight){
				maxHeight=document.getElementById(div_3).offsetHeight;
			}
		}
		if(document.getElementById(div_1) && document.getElementById(div_2) && document.getElementById(div_3)){
			document.getElementById(div_1).style.height=maxHeight + "px";
			document.getElementById(div_2).style.height=maxHeight + "px";
			document.getElementById(div_3).style.height=maxHeight + "px";
		}
}

function setSelectVal(sel_id, val){
	document.getElementById(sel_id).value=val;
}

function isValidEmail(sEmail){
    var isValid;
	var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/
    if (!sEmail.match(re)) {
        isValid = false; 
    }
	else {
		isValid = true; 
	}
    return isValid;
}

function checkForm(form_id){
	switch(form_id){
		case "form_contactus":
			if(document.getElementById("name").value==""){
				alert("Please fill out your name.");
				document.getElementById("name").focus();
				return false;
			}
			if(document.getElementById("email").value==""){
				alert("Please fill out your e-mail address.");
				document.getElementById("email").focus();
				return false;
			}
			else if(!isValidEmail(document.getElementById("email").value)){
				alert("The email you specified is not valid.");
				document.getElementById("email").focus();
				return false;
			}
			if(document.getElementById("topic").value==""){
				alert("Please select a subject.");
				document.getElementById("topic").focus();
				return false;
			}
			if(document.getElementById("message").value==""){
				alert("Please write your message.");
				document.getElementById("message").focus();
				return false;
			}
		break;
	}
	return true;
}