//////////// email validation script
/////////////////////////////////////////////////////////////
// Email validation script I borrowed from who knows where...

function validEmail(email) {
    invalidChars = "/:,;"

    for (i=0;i<invalidChars.length;i++) {
        badChar = invalidChars.charAt(i)
        if (email.indexOf(badChar,0) > -1) {
            return false
        }
    }
    atPos = email.indexOf("@",1)
    if (atPos == -1) {
        return false
    }
    if (email.indexOf("@",atPos+1) > -1) {
        return false
    }
    periodPos = email.indexOf(".",atPos)
    if (periodPos == -1) {
        return false
    }
    if (periodPos+3 > email.length) {
        return false
    }
    return true

}

//////////////////////////////////////////////////////////////////
// Calendar Popup Window Function.


function popupWindow (url,winName,details) {
	var showWindow = window.open(url,winName,details);
}



// Toggle Block Visibility
//
// Use this to toggle the visibility of a block item on the page
// input: item_id

function ToggleBlockVisibility(item_id) {
	if (document.getElementById(item_id).style.display != "block") {
		document.getElementById(item_id).style.display = "block";
	}
	else {
		document.getElementById(item_id).style.display = "none";
	}
}