// Email
function check_email(fmv){
	if(fmv.length != 0){
		if ( fmv.search(/(\S+)@(\S+)\.(\S+)/) == -1 ){
			return false; 
		}
	}
	return true;
}

// Homepage
function preview(frm){
	if(frm.homepage.value=="http://" || frm.homepage.value=="" || frm.homepage.value==null){
		alert('Insert URL');
		frm.homepage.focus();
	}else{
		window.open(frm.homepage.value,'_blank','');
	}
}

// Text Filter
function isOnlyExist(s,valuestr){
	var valuestr;
	if(!valuestr){
		var valuestr = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890-_";
	}

	var k = 0;
	for(i=0;i<s.length;i++){
		
		if(valuestr.indexOf(s.substring(i,i+1)) >= 0){
			k = k + 1;
		}else{
			break;
		}
	}

	if(k==s.length){
		return true;
	}else{
		return false;
	}
	return false;
}

// window open
function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}
 
// preview 1
function pvimage(imgname){
	MM_openBrWindow("/app/view_photo.php?imgname="+imgname,"vp1","width=100,height=100");
}


// preview 2
function preview_image(frm_val_obj,frm_img_obj){
	if(!frm_val_obj.value){
		frm_img_obj.src = '/image/preview_blank.gif';
		frm_img_obj.width = 0;
		frm_img_obj.height = 0;
		return;
	}else{
		frm_img_obj.src = frm_val_obj.value;
		frm_img_obj.width = 80;
		frm_img_obj.height = 80;
	}
}