// validate email 
function ValidateEmail(email){	
	re=/^[_a-z0-9-]+(.[_a-z0-9-]+)*@[a-z0-9-]+(.[a-z0-9-]+)*(.[a-z]{2,3})$/
    if(!re.exec(email))    {
        return false;
    }else{
        return true;
    };
};

// validate num 
function ValidateNumber(number){	
	re=/^[0-9-]$/
    if(!re.exec(email))    {
        return false;
    }else{
        return true;
    };
};

// validate http 
function ValidateHttp(http){	
	re=/^http\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?$/
    if(!re.exec(http))    {
        return false;
    }else{
        return true;
    };
};

// validate Img Src 
function ValidateImg(img){	
	re=/(?:([^:\/?#]+):)?(?:\/\/([^\/?#]*))?([^?#]*\.(?:jpg|gif|png))(?:\?([^#]*))?(?:#(.*))?/
    if(!re.exec(img))    {
        return false;
    }else{
        return true;
    };
};
    
// validate twitter username 
function ValidateTwitterUsername(twitterusername){	
	re=/@([A-Za-z0-9_]+)/
    if(!re.exec(twitterusername))    {
        return false;
    }else{
        return true;
    };
};