//Password check start 
					function PasswordStrength(showed){	
						this.showed = (typeof(showed) == "boolean")?showed:true;
						this.styles = new Array();	
									
						this.styles[0] = {backgroundColor:"#EBEBEB",borderLeft:"solid 1px #FFFFFF",borderRight:"solid 1px #BEBEBE",borderBottom:"solid 1px #BEBEBE"};	
						this.styles[1] = {backgroundColor:"#F95959",borderLeft:"solid 1px #FFFFFF",borderRight:"solid 1px #BB2B2B",borderBottom:"solid 1px #BB2B2B"};
						this.styles[2] = {backgroundColor:"#FFD35E",borderLeft:"solid 1px #FFFFFF",borderRight:"solid 1px #E9AE10",borderBottom:"solid 1px #E9AE10"};
						this.styles[3] = {backgroundColor:"#A0C198",borderLeft:"solid 1px #FFFFFF",borderRight:"solid 1px #3BBC1B",borderBottom:"solid 1px #3BBC1B"};
						
						this.labels= ["弱","中","强"];
					
						this.divName = "password_div_"+Math.ceil(Math.random()*100000);
						this.minLen = 1;
						
						this.width = "140px";
						this.height = "20px";
						
						this.content = "";
						
						this.selectedIndex = 0;
						
						this.init();	
					}
					PasswordStrength.prototype.init = function(){
						var s = '<table cellpadding="0" id="'+this.divName+'_table" cellspacing="0" style="width:'+this.width+';height:'+this.height+';margin-top:1px">';
						s += '<tr>';
						for(var i=0;i<3;i++){
							s += '<td id="'+this.divName+'_td_'+i+'" width="33%" align="center"><span style="font-size:1px">&nbsp;</span><span id="'+this.divName+'_label_'+i+'" style="display:none; font-family: Courier New, Courier, mono;font-size: 12px;color: #000000">'+this.labels[i]+'</span></td>';
						}	
						s += '</tr>';
						s += '</table>';
						this.content = s;
						if(this.showed){
							document.write(s);
							this.copyToStyle(this.selectedIndex);
						}	
					}
					PasswordStrength.prototype.copyToObject = function(o1,o2){
						for(var i in o1){
							o2[i] = o1[i];
						}
					}
					PasswordStrength.prototype.copyToStyle = function(id){
						this.selectedIndex = id;
						for(var i=0;i<3;i++){
							if(i == id-1){
								this.$(this.divName+"_label_"+i).style.display = "inline";
							}else{
								this.$(this.divName+"_label_"+i).style.display = "none";
							}
						}
						for(var i=0;i<id;i++){
							this.copyToObject(this.styles[id],this.$(this.divName+"_td_"+i).style);			
						}
						for(;i<3;i++){
							this.copyToObject(this.styles[0],this.$(this.divName+"_td_"+i).style);
						}
					}
					PasswordStrength.prototype.$ = function(s){
						return document.getElementById(s);
					}
					PasswordStrength.prototype.setSize = function(w,h){
						this.width = w;
						this.height = h;
					}
					PasswordStrength.prototype.setMinLength = function(n){
						if(isNaN(n)){
							return ;
						}
						n = Number(n);
						if(n>1){
							this.minLength = n;
						}
					}
					PasswordStrength.prototype.setStyles = function(){
						if(arguments.length == 0){
							return ;
						}
						for(var i=0;i<arguments.length && i < 4;i++){
							this.styles[i] = arguments[i];
						}
						this.copyToStyle(this.selectedIndex);
					}
					PasswordStrength.prototype.write = function(s){
						if(this.showed){
							return ;
						}
						var n = (s == 'string') ? this.$(s) : s;
						if(typeof(n) != "object"){
							return ;
						}
						n.innerHTML = this.content;
						this.copyToStyle(this.selectedIndex);
					}
					PasswordStrength.prototype.update = function(s){
						if(s.length < this.minLen){
							this.copyToStyle(0);
							return;
						}
						var ls = -1;
						if (s.match(/[a-z]/ig)){
							ls++;
						}
						if (s.match(/[0-9]/ig)){
							ls++;
						}
						if (s.match(/(.[^a-z0-9])/ig)){
							ls++;
						}
						if (s.length < 6 && ls > 0){
							ls--;
						}
						 switch(ls) { 
							 case 0:
								 this.copyToStyle(1);
								 break;
							 case 1:
								 this.copyToStyle(2);
								 break;
							 case 2:
								 this.copyToStyle(3);
								 break;
							 default:
								 this.copyToStyle(0);
						 }
					}
					//Password check end