var com={
	initDate:function(){
		var date=new Date();
		var week=date.getDay();
		switch(week){
			case 0:week="日";break;
			case 1:week="一";break;
			case 2:week="二";break;
			case 3:week="三";break;
			case 4:week="四";break;
			case 5:week="五";break;
			case 6:week="六";break;
		}
		this.apm=date.getHours();
		if(this.apm>12){
			this.ap="下午好!";
		}else{
			this.ap="上午好!";
		}
		document.write(date.getFullYear() +"年"+ (date.getMonth()+1) +"月"+ date.getDate()+"日 星期"+week+this.ap);
	},
	init:function(){
		com.initDate();
		com.initform();
	},
	initform:function(t_key){
		var keyInput=document.getElementById(t_key||"t_key");
		if(!keyInput)return ;
			keyInput.onfocus=function(){
			if(keyInput.value==keyInput.defaultValue)
				keyInput.value="";
		}
		var form=keyInput.form;
		form.onsubmit=function(){
			if(keyInput.value==keyInput.defaultValue || keyInput.value==''){alert("请输入关键字");return false;}
		}
	}
}

function doZoom(up,contid){
	var contentarea=document.getElementById(contid || "contentarea");
	if(!contentarea)return;
	var fz=parseInt(getStyle(contentarea, 'fontSize'));
	//alert(fz);	
	if(up==1){
		if(fz>20)return;
		contentarea.style.fontSize=fz+2+"px";
	}else{
		if(fz<10)return;
		contentarea.style.fontSize=fz-2+"px";
	}
}

function getStyle(elem, name){
	if(elem.style[name])
		return elem.style[name];
	else if(elem.currentStyle)
		return elem.currentStyle[name];
	else if(document.defaultView && document.defaultView.getComputedStyle){
		name=name.replace(/([A-Z])/g,"-$1");
		name=name.toLowerCase();
		var s=document.defaultView.getComputedStyle(elem, "");
		return s && s.getPropertyValue(name);
	}else
		return null;
}

function doPrint() {
	if (window.print) { 
		var print_area       = document.getElementById("liv_print_area").innerHTML;
		
		var css = '<style type="text/css">' +
				  '.content { FONT-SIZE: 14px; COLOR: #000000; LINE-HEIGHT: 120% }' +
				  '</style>' ;

		var body ='<table width="600" border="0" cellspacing="0" cellpadding="5">' +
			  	  '  <tr> ' +
			  	  '    <td  class="content" colspan="2"> ' +
			  	  print_area + 
			  	  '    </td>' +
			  	  '  </tr>' +
			  	  '</table>';

		document.body.innerHTML =  css + body  ;
		window.print();
	}
}