$(window).load(function () {
	var bodywidth=$("body").width();
	var divwidth=$("#tab").width();
	var divs=(bodywidth-divwidth)/2-10;
  $("#test").css({ position: 'absolute', top: '0px',right : divs });		   
});
  $(this).scroll(function() {    // 页面发生scroll事件时触发
      var bodyTop = 0;
      if (typeof window.pageYOffset != 'undefined') {
          bodyTop = window.pageYOffset;
      }
       else if (typeof document.compatMode != 'undefined' && document.compatMode != 'BackCompat')
       {
          bodyTop = document.documentElement.scrollTop;
      }
      else if (typeof document.body != 'undefined') {
          bodyTop = document.body.scrollTop;
          bodyright = document.body.scrollWidth;
      }
      $("#test").css("top",bodyTop);   // 设置层的CSS样式中的top属性, 注意要是小写，要符合“标准”
    	if(bodyTop==0){
        $("#test").css("filter","alpha(opacity=100)");
        $("#test").hover(function(){   
				  $(this).css('filter','alpha(opacity=100)');   
				  },   
				  function(){   
				  $(this).css('filter','alpha(opacity=100)');   
				});
      }else{
        $("#test").css("filter","alpha(opacity=70)");
        $("#test").hover(function(){   
				  $(this).css('filter','alpha(opacity=100)');   
				  },   
				  function(){   
				  $(this).css('filter','alpha(opacity=70)');   
				});
      }
  });
  
  
  
  
function select_tag(){
	var selectVal = "";   
	var selectCheckbox = $("[name='MCLASS']:checked").each(function(){ 
    selectVal = selectVal + "," + $(this).val(); 
  });
  if(selectVal.indexOf("货主")>0){
  	$("#MSERVER").attr("disabled",false);
  	$("#MSERVER").attr("checked",true);
  }else{
  	$("#MSERVER").attr("checked",false);
  	$("#MSERVER").attr("disabled",true);
  }
}

function select_che(){
	var checkVal = $("#MSERVER");
	if(checkVal.attr("checked") == true){
		$("#MJIANYINO").attr("disabled",false);
	}else{
		$("#MJIANYINO").attr("disabled",true);
	}
}