String.prototype.trim = function(){
	return this.replace(/(^\s*)|(\s*$)/gi, "");
}

function init_comment(){
	var comment_default_val = document.getElementById("comment_default_val").value;
	document.getElementById("comment_btn_span").innerHTML = '<a href="#none" id="comment_write">'+ language_comment[0] +'</a>';
	document.getElementById("comment_write").onclick = function(){
		if(document.getElementById("comment_text").value == comment_default_val){
			alert(language_comment[1]);
			document.getElementById("comment_text").select();
		}else if(document.getElementById("comment_text").value.trim() == ""){
			alert(language_comment[2]);
			document.getElementById("comment_text").focus();
			document.getElementById("comment_text").select();
		} else {
			document.getElementById("comment_form").submit();
		}
	}
	
	if(document.getElementById("comment_text").value == ""){
		document.getElementById("comment_text").value = comment_default_val;
	}
	
	document.onclick = function(event){
		if(window.event)	var click_obj = window.event.srcElement;
		else var click_obj = event.target;
		if(click_obj.id != "comment_text"){
			if(document.getElementById("comment_text").value == ""){
				document.getElementById("comment_text").value = comment_default_val;
			}
		}
	}
	
	document.getElementById("comment_text").onclick = function(){
		if(document.getElementById("comment_text").value == comment_default_val){
			document.getElementById("comment_text").value = "";
		}
	}
	
	
	var atag = document.getElementById("comment_list").getElementsByTagName("A");
	for(var i=0; i<atag.length;i++){
		if(/delete_link/.test(atag[i].className)){
			atag[i].link_url = atag[i].href;
			atag[i].href="#none";
			atag[i].onclick = function(){
				if(!confirm(language_comment[3])){
					return;
				}
				else location.replace(this.link_url);
			}
		}
		else if(/recommand_link/.test(atag[i].className)){
			atag[i].link_url = atag[i].href;
			atag[i].href="#none";
			atag[i].onclick = function(){
				if(!confirm(language_comment[4])){
					return;
				}
				else location.replace(this.link_url);
			}
		}
		else if(/recommand_mine_link/.test(atag[i].className)){
			atag[i].href="#none";
			atag[i].onclick = function(){
				alert(language_comment[5]);
			}
		}
		else if(/recommand_re_link/.test(atag[i].className)){
			atag[i].href="#none";
			atag[i].onclick = function(){
				alert(language_comment[7]);
			}
		}
		else if(/recommand_login_link/.test(atag[i].className)){
			atag[i].href="#none";
			atag[i].onclick = function(){
				alert(language_comment[7]);
			}
		}
	}
}