function IsEmpty (txt){ var c,i; if (txt == "") return true; for (i=0; i<txt.length; i++) { c = txt.charAt(i);  if ( c!=" " && c!="\n" && c!="\t" && c!="\r") return false; } return true; }
function CheckName(cValue){    return cValue.match(/^[а-яА-Яa-zA-Z\ \-]{3,50}$/);}
function CheckEmail(cValue){    return cValue.match(/^[0-9a-zA-Z\_]+([0-9a-zA-Z.\-\_])*@([0-9a-zA-Z\_]+[.\-\_])+[a-zA-Z]+$/);}
function CheckNumbers(cValue){    return cValue.match(/^[0-9]{20,20}$/);}
function trim(s){if(!s.match(/[\S]/)) return '';(s+"#").match(/(^[^#]*)/);RegExp.$1.match(/([\S].*)/);RegExp.$1.match(/(.*[\S])/);return(RegExp.$1);}

var preloadFlag = false;
function preloadImages() {
 if (document.images) {
       l_over = newImage("img/main1/main_hunt.jpg");
//       l1_over = newImage("img/main1/small_hunt.jpg");

       l2_over = newImage("img/main1/main_fish.jpg");
//       l3_over = newImage("img/main1/small_fish.jpg");

       l4_over = newImage("img/main1/main_travel.jpg");
//       l5_over = newImage("img/main1/small_travel.jpg");

       l6_over = newImage("img/main1/main_karpfishing.jpg");
//       l7_over = newImage("img/main1/small_karpfishing.jpg");

       l8_over = newImage("img/menu_item.jpg");

       preloadFlag = true;
 }
}


function newImage(arg) {
 if (document.images) {
  rslt = new Image();
  rslt.src = arg;
  return rslt;
 }
}


function CheckFormSrch(form){
  if (IsEmpty(form.str_search.value)){
          alert('Введите строку для поиска!');
	  form.str_search.focus();
	  return false;
  }

  if (form.str_search.value.length < 3) {
        alert("Слишком короткое слово для поиска");
        form.str_search.focus();
        return false;
  }

  return true;
}




function changeSkin(type){
   if (type=="hunt"){
	document.getElementById("mim").src="img/main1/main_hunt.jpg";
	//document.getElementById("default_section").style.background="url(img/main1/small_hunt.jpg)";
   }

   if (type=="travel"){
	document.getElementById("mim").src="img/main1/main_travel.jpg";
	//document.getElementById("default_section").style.background="url(img/main1/small_travel.jpg)";
   }

   if (type=="fish"){
	document.getElementById("mim").src="img/main1/main_fish.jpg";
	//document.getElementById("default_section").style.background="url(img/main1/small_fish.jpg)";
   }

   if (type=="karpfishing"){
	document.getElementById("mim").src="img/main1/main_karpfishing.jpg";
	//document.getElementById("default_section").style.background="url(img/main1/small_karpfishing.jpg)";
   }
}