How to stop javascript hover from activating all the other hovers? -

i have couple pictures want hover when mouseenter once hover on 1 image, other images change mouseenter well. how stop happening can hover 1 @ time without affecting others?

<p><img src="http://static1.squarespace.com/static/5736026127d4bd28d97e2b7a/t/5790f505b8a79bc462950c46/1469117701248/k_1.png/" id="img1" onmouseenter="domouseenter()" onmouseleave = "domouseleave()"/></p> 

<p><img src="http://static1.squarespace.com/static/5736026127d4bd28d97e2b7a/t/5790f584be65943e371ac3c8/1469117828984/k_2.png/" align="right" id="img2" onmouseenter="domouseenter()" onmouseleave = "domouseleave()"/></p> 

<script language="javascript"> function domouseenter() { document.getelementbyid("img3").src = "http://static1.squarespace.com/static/5736026127d4bd28d97e2b7a/t/5790f6efd482e96f971b2dae/1469118191453/k_3_hover.png"; document.getelementbyid("img4").src = "http://static1.squarespace.com/static/5736026127d4bd28d97e2b7a/t/5790f7cc8419c25e40f16e6b/1469118412438/k_4_hover.png"; }  function domouseleave() { document.getelementbyid('img3').src = "http://static1.squarespace.com/static/5736026127d4bd28d97e2b7a/t/5790f603d482e96f971b24b2/1469117955279/k_3.png/"; document.getelementbyid('img4').src = "http://static1.squarespace.com/static/5736026127d4bd28d97e2b7a/t/5790f759b8a79bc462952502/1469118297585/k_4.png/";  } 

if want, can this:

<p><img src="http://static1.squarespace.com/static/5736026127d4bd28d97e2b7a/t/5790f505b8a79bc462950c46/1469117701248/k_1.png/" id="img1" onmouseenter="this.src='http://static1.squarespace.com/static/5736026127d4bd28d97e2b7a/t/5790f6efd482e96f971b2dae/1469118191453/k_3_hover.png'" onmouseleave = "this.src='http://static1.squarespace.com/static/5736026127d4bd28d97e2b7a/t/5790f603d482e96f971b24b2/1469117955279/k_3.png/'"/></p>        <p><img src="http://static1.squarespace.com/static/5736026127d4bd28d97e2b7a/t/5790f584be65943e371ac3c8/1469117828984/k_2.png/" align="right" id="img2" onmouseenter="this.src='http://static1.squarespace.com/static/5736026127d4bd28d97e2b7a/t/5790f7cc8419c25e40f16e6b/1469118412438/k_4_hover.png'" onmouseleave = "this.src='http://static1.squarespace.com/static/5736026127d4bd28d97e2b7a/t/5790f759b8a79bc462952502/1469118297585/k_4.png/'"/></p>