common

从网上收集的多个软件滤波算法文章,大概有10种.

function notIn(val,obj)
{
	var obj_size = obj.length;
	for(i = 0; i < obj_size; i++)
	{
		if(obj[i].value == 0 || obj[i].value == val)return false;
	}
	return true;
}

function addTo(theList,theSelect)
{
	var size1 = theList.length;
	var i = 0;
	i = theList.selectedIndex;
	if (i < 0) return false;

	if(notIn(theList[i].value,theSelect))
	{
		if(theList[i].value == 0)
		{
			theSelect.length = 1;
			theSelect[theSelect.length - 1].text = theList[i].text;
			theSelect[theSelect.length - 1].value = theList[i].value;
		}
		else
		{
			var size = theSelect.length;
			if (theSelect.length >= 3)
			{
				alert("最多不能超过3个选项");
				return false;
			}
			theSelect.length = size + 1;
			theSelect[theSelect.length - 1].text=theList[i].text;
			theSelect[theSelect.length - 1].value=theList[i].value;
		}
        return true;
	}
	/*
	else
	{
		alert("不能重复添加");
		return false;
	}*/
	return false;
}

function addToWithSubmit(theList,theSelect)
{
	var success = addTo(theList,theSelect);
	if (success == false) return false;

	var selectName = theSelect.name;
	var selectIndex = theList.selectedIndex;
	var itemNames = document.getElementsByName(selectName + "Names");
	var itemValues = document.getElementsByName(selectName + "Values");

	var i;
	// because addto is success, the length of theSelect is bigger than 0
	if(theSelect[0].value == 0)
	{
		itemNames[0].value = theList[selectIndex].value;
		itemValues[0].value = theList[selectIndex].text;
		// clear the other values
		for (i = 1; i < 3; i++)
		{
			itemNames[i].value = "";
			itemValues[i].value = "";
		}
	}
	else
	{
		// adjust the position of hidden value
		for (i = 0; i < 3; i++)
		{
			if (itemNames[i].value == "") break;
		}
		itemNames[i].value = theList[selectIndex].value;
		itemValues[i].value = theList[selectIndex].text;
	}
}

function moveWithSubmit(theSelect)
{
	theListId = theSelect.selectedIndex;
	var selectName = theSelect.name;
	remove(theSelect);

	if (theListId >= 0) {
		var itemNames = document.getElementsByName(selectName + "Names");
		var itemValues = document.getElementsByName(selectName + "Values");

		var i;
		for (i = theListId + 1; i < 3; i++)
		{
			itemNames[i - 1].value = itemNames[i].value;
			itemValues[i - 1].value = itemValues[i].value;
		}
		itemNames[i - 1].value = "";
		itemValues[i - 1].value = "";
	}
}

function remove(theSelect)
{
	var theListId = theSelect.selectedIndex;
	if (theListId < 0) return;

	if(theListId >= 0)
	{
		theSelect.remove(theListId);
	}

	if (theListId < theSelect.length)
	{
		theSelect.selectedIndex = theListId;
	}
	else
	if (theSelect.length > 0)
	{
		theSelect.selectedIndex = theSelect.length - 1;
	}
}


function changeSubSelect(theParent,theSub,theData)
{
	var theSelectedIndex = theParent.selectedIndex;
	var staff = theData[theSelectedIndex];
	
	len = staff.length / 2;
	theSub.length = len;
	for (var i = 0; i < len; i++)
	{
		theSub.options[i] = new Option(staff[2 * i],staff[2 * i + 1]);
	}
	theSub.selectedIndex = 0;
}

function selectValue(theObj,theSelectValue)
{
    var len = theObj.length;
    if (len == 0) return;

	for (var i = 0; i < len; i++)
	{
		if (theObj.options[i].value == theSelectValue)
       {
           theObj.selectedIndex = i;
           return;
       }
	}
}

function selectSingle(theObj)
{
	if (theObj.checked == false) return;
	var name = theObj.name;
	var itemNames = document.getElementsByName(name);
	var len = itemNames.length;
	for (var i = 0; i < len; i++)
	{
		if (itemNames != itemNames[i])
		{
			itemNames[i].checked = false;
		}
	}
	theObj.checked = true;
}

function popup(sUrl,sName,sFeatures)
{
	window.open(sUrl,sName,sFeatures);
}

function changeSearchList(sUrl,radioButton,labelName,changeList)
{
	var label = document.getElementById(labelName);
	//var labels = document.getElementsByName(labelName);
	//var label = labels[0];
	if (radioButton.value == 'ARTICLE')
	{
		label.innerHTML = "文章分类：";
	}
	else
	{
		label.innerHTML = "论坛分类：";
	}	
	//alert('changeList='+changeList);

    document.getElementById("sub").src =
        sUrl + "catType=" + radioButton.value + "&listName=" + changeList ;
}


/*
 * Create Date:2004-06-01
 * Author: Jeff.Zhou
 * Reload the sublist data.
 */
function updateList(changeList,values)
{	
	
    var list = document.getElementById(changeList);
	
	var len = list.length;
	
    for (var i = 1; i < len; i++)
    {
        list.remove(1);
    }

    nLen = values.length/2;
    for (var i = 0; i < nLen; i++)
    {
        list.options[i+1] = new Option(values[2*i+1],values[2*i]);
    }
    list.selectedIndex = 0;
}
/*
 *Author Wulf.wu
 *check the selected checkbox list
*/
function hint(sform,obj)
{
    var sel = false;
    if(obj)
    {
        if(obj.length > 1)
        {
            for(var i=0; i<obj.length; i++)
            {
                if(obj[i].checked)
                {
                    sel = true;
                    break;
                }
            }
            if(sel)
            {
                if(confirm("确认要删除吗？"))
                    sform.submit();
            }
            else
                alert("请选择要删除的项!");
        }
        else
        {
            if(obj.checked)
            {
                if(confirm("确认要删除吗？"))
                    sform.submit();
            }
            else
                alert("请选择要删除的项!");
        }
    }
    else
        alert("请选择要删除的项!");
}


function checkForm(theForm){

	var str = Trim(theForm.keyword.value);

	if(str==""){

		alert("请输入关键词");

		theForm.keyword.focus();

		return false;

	}

	return true;

}	

function LTrim(str)

{

    var whitespace = new String(" \t\n\r");

    var s = new String(str);

    if (whitespace.indexOf(s.charAt(0)) != -1)

    {

        var j=0, i = s.length;

        while (j < i && whitespace.indexOf(s.charAt(j)) != -1)

        {

            j++;

        }

        s = s.substring(j, i);

    }

    return s;

}



function RTrim(str)

{

    var whitespace = new String(" \t\n\r");

    var s = new String(str);

    if (whitespace.indexOf(s.charAt(s.length-1)) != -1)

    {

        var i = s.length - 1;

        while (i >= 0 && whitespace.indexOf(s.charAt(i)) != -1)

        {

            i--;

        }

        s = s.substring(0, i+1);

    }

    return s;

}



function Trim(str)

{

    return RTrim(LTrim(str));

}