function setNull()
	{
	document.all.keywords1.value="";
	}
function OnSearch(){
   document.all.form2.submit();
}
function ContentSize(size)
	{
 	var obj=document.all.article;
 	obj.style.fontSize=size+"px";
	}
function style_mode(a){
	if (a=="1"){
		link_table1.style.display = "block";
		link_table2.style.display = "none";
		link_table3.style.display = "none";
		link_table4.style.display = "none";
		document.getElementById("style_1").className = "font17";
		document.getElementById("style_2").className = "font18";
		document.getElementById("style_3").className = "font18";
		document.getElementById("style_4").className = "font18";
	}
	if(a=="2"){
		link_table1.style.display = "none";
		link_table2.style.display = "block";
		link_table3.style.display = "none";
		link_table4.style.display = "none";
		document.getElementById("style_1").className = "font18";
		document.getElementById("style_2").className = "font17";
		document.getElementById("style_3").className = "font18";
		document.getElementById("style_4").className = "font18";
	}
	if(a=="3"){
		link_table1.style.display = "none";
		link_table2.style.display = "none";
		link_table3.style.display = "block";
		link_table4.style.display = "none";
		document.getElementById("style_1").className = "font18";
		document.getElementById("style_2").className = "font18";
		document.getElementById("style_3").className = "font17";
		document.getElementById("style_4").className = "font18";
	}
	if(a=="4"){
		link_table1.style.display = "none";
		link_table2.style.display = "none";
		link_table3.style.display = "none";
		link_table4.style.display = "block";
		document.getElementById("style_1").className = "font18";
		document.getElementById("style_2").className = "font18";
		document.getElementById("style_3").className = "font18";
		document.getElementById("style_4").className = "font17";
	}
}