ELEMENT LOCATORS IN SELENIUM

ID (id) Locator: Select the element with the specified @id attribute.
For example, 

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1. id=name  

is the id locator in below html code:

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1. <input type="text" name="name" id="name" />  

NAME (name) Locator: Select the first element with the specified @name attribute.

For example,

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1. namename=name  

is the name locator in below html code:

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1. <input type="text" name="name" id="name" />  

CSS (cssSelectorSyntax) Locator: Select the element using css selectors.
For example,

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1. css=a[href="#id3"]  

is the css locator in below html code:

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1. <a href="#id3">Test Link 3</a>  

DOM (javascriptExpression) Locator: Find an element using JavaScript traversal of the HTML Document Object Model. DOM locators must begin with "document.".
For example,

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1. dom=document.forms['myForm'].myName  

is the dom locator in below html code:

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1. <form name="myForm" id="myForm" action="#" method="post">  
2.   
3. <input type="text" name=" myName " id="myName" />  
4.   
5. </form>  

Xpath (xpathExpression) Locator: Locate an element using an XPath expression.
For example,

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1. xpath=//table[@id='table1']//tr[2]/td[2]  

is the xpath locator of “link22” element in below html code:

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1. <table id="table1">  
2.   
3. <tbody>  
4.   
5. <tr><td>link11</td><td>link12</td></tr>  
6.   
7. <tr><td>link21</td><td>link22</td></tr>  
8.   
9. </tbody>  
10.   
11. </table>