// Common fuctions for field validation
function isblank(svalue)
{
	svalue1 = new String(svalue);
	for(var i = 0; i < svalue1.length; i++) 
	{
		var c = svalue1.charAt(i);
		if((c != ' ') && (c != '\n') && (c!='\t')) return false;
	} 
	return true;
}

function isEmail(string) {
    if (string.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1)
        return true;
    else
        return false;
}

function isPhone(strPhone){
var validChars = ".-()[] ";
s=stripCharsInBag(strPhone,validChars);
return (isInteger(s) && s.length >= 10);
}

function isInteger(s)
{   var i;
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag)
{   var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}