function LTrim(s) { for(var i=0;i < s.length;i++) if(s.charAt(i)!=' ') return s.substring(i,s.length); return ""; } function RTrim(s) { for(var i=s.length-1;i>=0;i--) if(s.charAt(i)!=' ') return s.substring(0,i+1); return ""; } function Trim(s) { return RTrim(LTrim(s)); } function checkForm(theForm) { var str="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ,./'[]{}`1234567890-=\~!@#$%^&*()_+|?><:"; if (Trim(theForm.guestname.value) == "") { alert("请填写您的姓名"); theForm.guestname.focus(); return(false); } var c=theForm.guestname.value.substr(0,1); if(str.indexOf(c)>-1) { alert("姓名必须填写中文"); theForm.guestname.focus(); return(false); } if(Trim(theForm.phone.value)=="") { alert("请填写您的电话"); theForm.phone.focus(); return(false); } if(theForm.address.value.length<5) { alert("留言地址不能少于5个字"); theForm.address.focus(); return(false); } if (theForm.content.value == "") { alert("请输入留言内容"); theForm.content.focus(); return(false); } theForm.sbt.disabled=true; return true; } function ShowMenuCon() { var obj1=document.getElementById('content_menu_1'); var obj2=document.getElementById('content_menu_2'); var obj3=document.getElementById('content_menu_3'); var obj4=document.getElementById('content_menu_4'); var num=Math.floor(Math.random()*4)+1; var obj=obj1; if(num==1) obj=obj1; else if(num==2) obj=obj2; else if(num==3) obj=obj3; else obj=obj4; obj1.style.display="none"; obj2.style.display="none"; obj3.style.display="none"; obj4.style.display="none"; obj.style.display=""; } function HiddenMenuCon() { var obj1=document.getElementById('content_menu_1'); var obj2=document.getElementById('content_menu_2'); var obj3=document.getElementById('content_menu_3'); var obj4=document.getElementById('content_menu_4'); obj1.style.display="none"; obj2.style.display="none"; obj3.style.display="none"; obj4.style.display="none"; } function KeepMenu(obj) { obj.style.display=""; } function HiddenMenu(obj) { obj.style.display="none"; } function putin(v) { if(document.getElementById("content").value!="") document.getElementById("content").value+="\n"+v; else document.getElementById("content").value=v; } document.writeln("